intra-coronal retainer

例句：

1. 1. The patient needed to have the tooth extracted and then a temporary intracoronal retainer was placed.
   患者需要拔除牙齿，然后放置临时的牙冠内固定器。
2. 2. The orthodontist recommended that the patient wear an intracoronal retainer for six months to help correct the bite.
   正畸医生建议患者佩戴牙冠内固定器六个月，以帮助纠正咬合。
3. 3. During the procedure, the dentist carefully placed the intracoronal retainer to ensure itfits snugly and securely in place.
   在手术过程中，牙医小心翼翼地放置牙冠内固定器，确保它牢固地安装在适当位置。